Benjamin cawthorn



I (Noodem Q I B'. QAW'I-HORN 81;v J: PJOOBNETT. APPARATUS FDR BREAKINGAND BLEAUHINGFIBR OUS MATERIALS.

No. 535,237. BatentedMar. 5,1 95.

J Am JW m: M A; 47 gm m NlTED STATES BENJAMIN OAWTHORN, OF HYLTON,

R. S. 0., AND JAMES P. OORNETT, OF

GLAXHEUGH, ENGLAND.

APPARATUS FOR BREAKING AND BLEACHING FIBROUS MATERIALS.

SPECIFICATION forming part of Letters Patent No. 535,237, dated March 5,1895.

Application filed July 19, 1 894.

To all whom it may concern.-

Be it known that we, BENJAMIN OAwTHoRN,

residing at Fords Paper Works, Hylton, R, S. 0.,and JAMES PORTEUSCORNETT, residing at Olaxheugh, near Sunderland, in the county ofDurham, England, subjects of the Queen of Great Britain and Ireland,have invented certain Improvements inApparatus forBreaking and BleachingFibrous Materials, of which the following is a specification.

This invention has reference to improvements in apparatus used in theprocess of breaking and bleaching fibrous materials.

To effect our purpose we may readily apply our improvements to existingHollander engines by removing the roll and plate and by connecting tothe plate orifice a pump or elevator adapted to withdraw the contents ofthe vat or engine and deliver them again at a suitable level or head topromote adequate circulation, propulsion, agitation and constantexposure of fresh surfaces of fiber to the bleaching agent or liquor inthe vat or engine. At the suction and delivery sides of the backfallcertain guiding walls or feathers are built to facilitate the How of thevat contents in the engine as hereinafter described.

The pump may preferably be of the centrifugal or other like type and inthis manner a great saving in motive power and in bleaching material maybe effected.

We will describe our improvements with reference to the accompanyingdrawings, in Which- Figure 1 shows a plan view and Fig. 2 a side View ofan ordinary Hollander engine in which the roll and plate are removed,the parts being arranged in accordance with our invention.

It will be observed that to the side of the vat where the orifice forthe plate is situated we attach the suction pipe of a centrifugal pump Pthe delivery pipe P from which we Serial No. 517,968. (No model.)

carry upward to deliver at D over the top of the ordinary backfall B ofthe engine. The

fibrous material together with the bleaching liquor in the vat is thuscaused to be circulated and propelled round and round the midfeather Mof the engine by the action of the pump P which also has the effect ofthoroughly agitating and breaking the fiber and by its constant exposureto the bleach the fiber is more thoroughly bleached and with less powerand bleaching material than has hitherto been the case.

The vat must be fitted inside with guiding feathers or walls Fto directthe course of the material therein both to the pump and there from asindicated in the drawings.

The plate bed S it will be observed thus serves as a conduit leading tothe pump-sue tion pipe.

What we claim as our invention, and desire to secure by Letters Patent,is-

The combination with the vat of an ordinary Hollander engine having amidfeather M of curved guiding feathers or walls F situated on bothsides of the backfall B and a centrifugal pumpP the suction pipe ofwhich is fitted to the vat on one side of the backfall and the deliverypipe of which is carried upward to deliver at D over the backfall into adiverging channel-shaped space formed by the walls F as shown theseveral parts being arranged and adapted for use substantially as hereinset forth.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

BENJAMIN OAWTHORN. J. P. CORNETT. Witnesses:

Y. CAMSEY, 3O Peacock Street, West Sunderlcmd.

JOHN W. GOLDSBROUGH, 43 Forster Street, Monlc- Wearmouth.

